The GLAST Background Model

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In order to estimate the ability of the GLAST/LAT to reject unwanted background of charged particles, optimize the on-board processing, size the required telemetry and optimize the GLAST orbit, we developed a detailed model of the background particles that would affect the LAT. In addition to the well-known components of the cosmic radiation, we included splash and reentrant components of protons, electrons (e+ and e-) from 10 MeV and beyond as well as the albedo gamma rays produced by cosmic ray interactions with the atmosphere. We made estimates of the irreducible background components produced by positrons and hadrons interacting in ... continued below

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2 pages

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Ormes, J.F.; U., /Denver; Atwood, W.; /UC, Santa Cruz; Burnett, T.; /Washington U., Seattle et al. October 17, 2007.

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In order to estimate the ability of the GLAST/LAT to reject unwanted background of charged particles, optimize the on-board processing, size the required telemetry and optimize the GLAST orbit, we developed a detailed model of the background particles that would affect the LAT. In addition to the well-known components of the cosmic radiation, we included splash and reentrant components of protons, electrons (e+ and e-) from 10 MeV and beyond as well as the albedo gamma rays produced by cosmic ray interactions with the atmosphere. We made estimates of the irreducible background components produced by positrons and hadrons interacting in the multilayered micrometeorite shield and spacecraft surrounding the LAT and note that because the orbital debris has increased, the shielding required and hence the background are larger than were present in EGRET. Improvements to the model are currently being made to include the east-west effect.

Physical Description

2 pages

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  • Journal Name: AIP Conf.Proc.921:560-561,2007; Conference: Prepared for 1st GLAST Symposium, Stanford, Palo Alto, 5-8 Feb 2007

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  • Report No.: SLAC-PUB-12896
  • Grant Number: AC02-76SF00515
  • Office of Scientific & Technical Information Report Number: 918037
  • Archival Resource Key: ark:/67531/metadc880084

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Office of Scientific & Technical Information Technical Reports

Reports, articles and other documents harvested from the Office of Scientific and Technical Information.

Office of Scientific and Technical Information (OSTI) is the Department of Energy (DOE) office that collects, preserves, and disseminates DOE-sponsored research and development (R&D) results that are the outcomes of R&D projects or other funded activities at DOE labs and facilities nationwide and grantees at universities and other institutions.

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  • October 17, 2007

Added to The UNT Digital Library

  • Sept. 22, 2016, 2:13 a.m.

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  • Dec. 5, 2016, 6:25 p.m.

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Ormes, J.F.; U., /Denver; Atwood, W.; /UC, Santa Cruz; Burnett, T.; /Washington U., Seattle et al. The GLAST Background Model, article, October 17, 2007; [Menlo Park, California]. (digital.library.unt.edu/ark:/67531/metadc880084/: accessed October 21, 2017), University of North Texas Libraries, Digital Library, digital.library.unt.edu; crediting UNT Libraries Government Documents Department.